CHAP. IV. PRIMARY DIVISIONS, THEIR ANALOGIES. 99 



very large, but the mantle not lobed or reflected. 



{fig^ 6.)* 



(88.) These primary divisions having long been ad- 

 mitted by all writers, we shall at once compare them 

 with those of the predaceous Zoophaga. 



Analogy of the Volutid.e and the Zoophaga 



Analogies. 



Sub-families of the 

 Voiutidte. 



Families of the 

 Zoophaga. 



VOLUTINA. 



MlTRIX^. 

 OLIVINiE. 



Ancillarin^, 

 Marginellin^. 



[ 



Foot of the animal excessively 

 large ; base of the shell trun 

 cate, 



{Volutince and Cassin^.) 



■•} 



Foot small, not so long as the'J 

 shell, the base of which is con- r 

 tracted. J 



{Mitrttus and Scolymus.) 



f Spire very short ; tip papillary j 1 

 X pillar plaited. J 



Spire nearly or quite concealed. 

 Outer lip detached and thick- 



{ 



ened. 



] 



Muricidce. 



Turbinellidis. 



I'olutid^. 



Ci/prceidee. 



Strombidce. 



Thus, the truncated and wide-mouthed helmet-shells, 

 among the MuricidcE, find their prototypes in the melon 

 volutes ; and the muricated mitres, in the sub- typical 

 Turhinellida;, with which they also agree in their fu- 

 siform shape. The Olivines correspond to the typical 

 volutes, in having their foot excessively large. The ani- 

 mal of Ancillaria is unknown ; but, from the high polish 

 of the shells, we may suppose it is analogous to the 

 cowries. Lastly, the 3Iarginellincp are clearly proto- 

 types of the Stromhid<T, as they are the only volutes 

 which have the top of the outer lip detached from the 

 body-whorl, 



(89-) The weakest point in the foregoing table is 

 that, perhaps, which relates to the Ancillarice ; but, by 

 comparing the family with the Cassidce, the station of 

 this group will be more clearly shown. 



* The annexed cut is from one of the unpublished drawings of Guildinj: 

 the shell is jiure white. 



H 2 



